A long long time ago, mesapotamians created an invention called writing. Back then, they didn't have writing like we have now. They used to use clay and a stick to write. But it wasn't like our writing today. They used symbols to understand each other.
They also built a waterway called a canal. A canal can help with floods. The Mesopotamians were surrounded by water. These canals were made by concrete and are still used today.
Lastly, they invented the wheel. If we didn't have the wheel today we would not be able to get around the earth.
This is the map of Mesopotamia and the Fertile Crescent